Multifunctional laparoscopic surgical instrument

Abstract

The invention relates to the technical field of medical instruments, in particular to a multifunctional laparoscopic surgical instrument. Comprising a handle, a trigger, a jaw rotating mechanism, a pull rod shifting fork, an outer cylinder, an outer cylinder rotating mechanism, a steel wire, a pull rod, a rotating pull head, a head changing nut, an H connecting piece, a front steering piece, a rear steering piece and a working part. According to the multifunctional laparoscopic surgical instrument, the working part is detachable, and the scissors, the forceps, the grabber and other instruments can be conveniently replaced so as to meet surgical requirements; the working part can be bent and rotated, can be bent by not less than 45 degrees on the left and the right, and can also rotate by nearly 360 degrees at various bending angles; the operation range is larger, and the operation is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a multifunctional laparoscopic surgical instrument. Background Art

[0002] Laparoscopic surgery is a surgery performed using a laparoscope and related instruments. Several small incisions with a diameter of 5 to 12 mm are made in different parts of the abdomen. Camera lenses and various special surgical instruments are inserted through these small incisions. The images of various organs in the abdomen taken by the camera inserted into the abdomen are transmitted to the TV screen. The surgeon observes the images and uses various surgical instruments to perform operations outside the body to complete the surgery. In recent years, laparoscopic surgery (also called minimally invasive surgery) has been increasingly used due to its small incisions, small scars, and quick recovery.

[0003] At present, there are many instruments used in laparoscopic surgery, but they are relatively simple in use and have limited flexibility. For example, the patent document with application number 201010234653.8 discloses a multifunctional laparoscopic surgery bendable surgical forceps, which is mainly used for human internal organ surgery and belongs to the field of medical instruments; its forceps head is designed with a shaped curved joint assembly, the clamp is designed with non-destructive clamping teeth and arc grooves that match the upper and lower anastomosis, the forceps body has an electrocoagulation hemostasis function, and the forceps rod can rotate 360 ​​degrees and is designed with 16 positioning system points. The invention has a simple and reasonable structure and good application effect. It can be used for searching, grasping, pulling, separating, imaging and electrocoagulation hemostasis of tissues and tubes in the abdominal cavity of the human body. It is convenient and safe to use in surgery; it solves the defects of the prior art that the application function of surgical instrument forceps is single, resulting in many operating channels required in surgery, many surgical procedures, and frequent replacement of surgical instruments. However, the instrument can only be used for the use of surgical forceps, the applicable scope of surgery is limited, and its bending angle is limited by the structure, with low precision and small bending angle. Summary of the invention

[0004] The object of the present invention is to provide a multifunctional laparoscopic surgical instrument, the working part of which is detachable and can be easily replaced with scissors, forceps, graspers and other instruments to meet the needs of the operation; and the working part is also bendable and rotatable and can be bent by not less than 45° to the left and right, and at various bending angles, the working part can also be rotated nearly 360°, so that the surgical range is larger and the operation is more convenient.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A multifunctional laparoscopic surgical instrument, comprising a handle, a trigger, a jaw rotation mechanism, a pull rod fork, an outer cylinder, an outer cylinder rotation mechanism, a steel wire, a pull rod, a rotating pull head, a head-changing nut, an H-connector, a front steering plate, a rear steering plate and a working part, wherein the handle is provided with a mounting bracket for mounting the trigger and the outer cylinder rotation mechanism, the pull rod fork is connected to the trigger, the jaw rotation mechanism is mounted on the pull rod fork, the jaw rotation mechanism is detachably connected to one end of the pull rod, the other end of the pull rod is connected to the steel wire, the pull rod and the steel wire are connected in the outer cylinder, the outer cylinder is detachably connected to the outer cylinder rotation mechanism, the front steering plate is detachably connected to the rear steering plate The steering plate is buckled into a cylindrical shape and inserted into the end of the outer cylinder. The outer cylinder is provided with two spiral holes, which are opposite to each other and staggered up and down. The front steering plate and the rear steering plate are respectively fixed with a guide pin, and the two guide pins are respectively in the two spiral holes. With the rotation of the outer cylinder, the two guide pins move in the two spiral holes respectively and drive the front steering plate and the rear steering plate to extend and retract relative to each other. The head-changing nut is hinged to the H connecting piece and is respectively hinged to the front steering plate and the rear steering plate. The head-changing nut is connected to a rotating pull head through a thread, and the rotating pull head is hinged to the working part. The other end of the steel wire is connected to the rotating pull head.

[0007] The rotary slider includes a slider and a slider sleeve, one end of the slider sleeve is provided with an external thread connected to a head-changing nut, the slider sleeve is hinged with a pin hole cross-connected to the working part, the slider is inserted into the slider sleeve, a long hole is provided at the tail of the working part, one end of the slider is hinged with the long holes of the two working parts through a pin shaft, and the other end of the slider is fixedly connected to a steel wire.

[0008] The working parts of the surgical instruments include scissors, forceps, graspers and the like, and different shapes, models and specifications under each category to meet various professional surgical needs.

[0009] The outer cylinder rotation mechanism includes a steering disassembly button, a steering twist and a steering sleeve. One end of the steering sleeve is fixedly connected to the outer cylinder, and the other end of the steering sleeve is provided with a flat groove. The steering disassembly button is plugged into the steering twist, and a spring is provided on the opposite side of the steering disassembly button. The steering disassembly button is provided with a steering sleeve plug-in hole. The steering sleeve plug-in hole consists of a round hole and a flat hole. The round hole matches the outer diameter of the steering sleeve, and the flat hole matches the flat groove of the steering sleeve.

[0010] One end of the trigger is hinged to the handle, and the pull rod fork is provided with two sliding guide pins which are respectively slidably plugged with the handle, and the sliding guide pins are sleeved with springs.

[0011] The jaw rotation mechanism includes a pull rod locking sleeve and a pull rod locking nut. The pull rod locking sleeve is threadedly connected to the internal thread of the pull rod locking nut through an external thread. The pull rod locking nut is provided with a conical center hole. The pull rod locking sleeve is fixed with an open pin, and the open pin is plugged into the conical center hole. The outer end surface of the pull rod locking sleeve is provided with an arc groove, and the arc groove is less than 360°. The pull rod locking sleeve is rotatably connected to the pull rod fork through a pin shaft. The pull rod fork is provided with a positioning pin, and the positioning pin is docked with the arc groove and slidably connected.

[0012] A pull rod sleeve is also provided between the pull rod and the outer cylinder. One end of the pull rod sleeve is connected to the handle, and the other end is provided with a sliding groove. The front steering piece and the rear steering piece are slidably connected to the sliding groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] A multifunctional laparoscopic surgical instrument, the working part of which is detachable, and scissors, forceps, graspers and other instruments can be easily replaced to meet surgical needs and reduce purchase costs; the working part is also bendable and rotatable, and can be bent by not less than 45° to the left and right, and can also be rotated nearly 360° at various bending angles, so that the surgical range is larger and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall appearance diagram of the present invention.

[0016] Figure 2 yes Figure 1 Top view of the .

[0017] Figure 3 yes Figure 2 AA section view.

[0018] Figure 4 yes Figure 1 Enlarged view of A.

[0019] Figure 5 yes Figure 3 Enlarged view of B.

[0020] Figure 6 yes Figure 2 Enlarged view of C.

[0021] Figure 7 It is an exploded view of the present invention.

[0022] Figure 8 It is the left side view of the front steering plate.

[0023] Fig. 9 It is the front view of the front steering plate.

[0024] Fig.10 It is the right side view of the front steering plate.

[0025] Fig.11 It is a top view of the front steering blade.

[0026] Fig.12 It is the left side view of the rear steering plate.

[0027] Fig.13 It is the front view of the rear steering plate.

[0028] Fig.14 It is the right side view of the rear steering plate.

[0029] Fig.15 It is a top view of the rear steering blade.

[0030] Fig.16 It is a schematic diagram of the structure on the other side of the tie rod locking nut.

[0031] Fig.17 It is the front view of the tie rod locking sleeve.

[0032] Fig.18 It is a side sectional view of the tie rod locking sleeve.

[0033] Fig.19 It is a schematic diagram of the structure of the steering disassembly button.

[0034] In the figure: 1-handle, 2-pull rod fork, 3-rotating pull head, 4-mounting bracket, 5-flat hole, 6-round hole, 7-pull rod locking sleeve, 8-pull rod locking nut, 9-steering sleeve, 10-steering twist, 11-steering disassembly button, 12-opening pin, 13-arc slot, 14-internal thread, 15-sliding guide pin, 16-pull rod, 17-outer cylinder, 18-pull rod outer sleeve, 19-guide pin, 20-front steering plate, 21-rear steering plate, 22-steel wire, 23-H connector, 24-turning pin, 25-head replacement nut, 26-working part pull head outer sleeve articulated shaft, 27-pull head, 28-pull head outer sleeve, 29-working part pull head articulated shaft, 30-working part, 31-long hole, 32-spiral hole, 33-locating pin, 34-conical center hole, 35-spring. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with embodiments, but the implementation scope of the present invention is not limited to the following embodiments.

[0036] like Figure 1-Figure 19As shown, a multifunctional laparoscopic surgical instrument includes a handle 1, a trigger 2, a jaw rotation mechanism, a pull rod fork 3, an outer cylinder 17, an outer cylinder rotation mechanism, a steel wire 22, a pull rod 16, a rotating pull head, a head replacement nut 25, an H connector 23, a front deflection plate 20, a rear deflection plate 21 and a working part 30, wherein the handle 1 is provided with a mounting bracket 4 for mounting the trigger 2 and the outer cylinder rotation mechanism, the pull rod fork 3 is connected to the trigger 2, the jaw rotation mechanism is mounted on the pull rod fork 3, the jaw rotation mechanism is detachably connected to one end of the pull rod 16, the other end of the pull rod 16 is connected to the steel wire 22, the pull rod 16 and the steel wire 22 are connected in the outer cylinder 17, the outer cylinder 17 is detachably connected to the outer cylinder rotation mechanism, the front deflection plate 20 is detachably connected to the rear deflection plate 21, The steering blade 21 is buckled into a cylindrical shape and inserted into the end of the outer cylinder 17. The outer cylinder 17 is provided with two spiral holes 32, which are arranged opposite to each other and staggered up and down. The front steering blade 20 and the rear steering blade 21 are respectively fixed with a guide pin 19, and the two guide pins 19 are respectively in the two spiral holes 32. As the outer cylinder 17 rotates, the two guide pins 19 move in the two spiral holes 32 respectively and drive the front steering blade 20 and the rear steering blade 21 to extend and retract relative to each other. The head-changing nut 25 is hinged to the H connecting piece 23 and is respectively hinged to the front steering blade 20 and the rear steering blade 21. The head-changing nut 25 is threadedly connected to a rotating pull head, and the rotating pull head is hinged to the working part 30. The other end of the steel wire 22 is connected to the rotating pull head.

[0037] The rotary slider includes a slider 27 and a slider sleeve 28, one end of the slider sleeve 28 is provided with an external thread connected to the head-changing nut 25, the slider sleeve 28 is hinged with a pin hole cross-connected with the working part 30 through the working part slider sleeve hinge shaft 26, the slider 27 is inserted into the slider sleeve 28, the tail of the working part 30 is provided with a long hole 31, one end of the slider 27 is hinged with the long holes 31 of the two working parts 30 through the working part slider hinge shaft 29, and the other end of the slider 27 is fixedly connected to the steel wire 22.

[0038] The working part 30 includes scissors, forceps, graspers and other categories, and different shapes, models and specifications under each category to meet various professional surgical needs.

[0039] The outer cylinder rotation mechanism includes a steering disassembly button 11, a steering twist 10 and a steering sleeve 9. One end of the steering sleeve 9 is fixedly connected to the outer cylinder 17, and the other end of the steering sleeve 9 is provided with a flat groove. The steering disassembly button 11 is plugged into the steering twist 10, and a spring is provided on the opposite side of the steering disassembly button 11. The steering disassembly button 11 is provided with a steering sleeve plug-in hole, and the steering sleeve plug-in hole is composed of a round hole 6 and a flat hole 5. The round hole 6 matches the outer diameter of the steering sleeve 9, and the flat hole 5 matches the flat groove of the steering sleeve.

[0040] One end of the trigger 2 is hinged to the mounting bracket 4 on the handle 1 , and the pull rod fork 3 is provided with two sliding guide pins 15 which are respectively slidably plugged with the handle 1 , and the sliding guide pins 15 are sleeved with springs 35 .

[0041] The jaw rotation mechanism includes a pull rod locking sleeve 7 and a pull rod locking nut 8. The pull rod locking sleeve 7 is threadedly connected to the internal thread 14 of the pull rod locking nut 8 through an external thread. The pull rod locking nut 8 is provided with a tapered center hole 34. The pull rod locking sleeve 7 is fixed with an open tip 12, and the open tip 12 is plugged into the tapered center hole 34. The outer end face of the pull rod locking sleeve 7 is provided with an arc groove 13, and the arc groove 13 is less than 360°. The pull rod locking sleeve 7 is rotatably connected to the pull rod fork 3 through a pin shaft. The pull rod fork 3 is provided with a positioning pin 33, and the positioning pin 33 is docked with the arc groove 13 and slidably connected.

[0042] A pull rod sleeve 18 is further provided between the pull rod 16 and the outer tube 17. One end of the pull rod sleeve 18 is connected to the handle 1, and the other end is provided with a sliding groove. The front steering piece 20 and the rear steering piece 21 are slidably connected to the sliding groove.

[0043] The handle 1 is fixed with an M-shaped mounting bracket 4 by bolts, and the steering knob 10 is set in the first slot of the M-shaped mounting bracket 4. The steering sleeve 9 is rotatably plugged into the bracket on the front side of the first slot and penetrates the steering knob 10, and is also penetrated into the round hole 6 of the steering disassembly button 11. When the steering disassembly button 11 is spring-loaded, the flat slot of the steering sleeve 9 is just stuck in the flat hole 5, so that the outer cylinder 17 can rotate with the steering knob 10, and the outer cylinder 17 can be disassembled by pressing the steering disassembly button 11. One end of the pull rod sleeve 18 passes through the steering sleeve 9 and is fixed on the bracket on the rear side of the first slot.

[0044] When the steering knob 10 is rotated, the outer cylinder 17 also rotates. At this time, the guide pins 19 on the front steering blade 20 and the rear steering blade 21 move upward and downward along the spiral hole 32, respectively, so that the front steering blade 20 and the rear steering blade 21 are extended and retracted respectively, so that the working part 30 can turn at the hinge between the head nut 25 and the H connecting piece 23 and the front steering blade 20 and the rear steering blade 21. Because the bending angle of the working part is controlled by the rotation angle of the steering knob 10, the control accuracy is also relatively high.

[0045] The upper end of the trigger 2 is hinged on the bracket on the rear side of the first slot. Pulling the trigger 2 can drive the jaw rotation mechanism to move backward. Two sliding guide pins 15 are fixed on the rear side of the pull rod fork 3, one above and one below, and are both slidably plugged with the handle 1. A spring 35 is sleeved on the sliding guide pin 15. The spring 35 provides a rebound force for the pull rod fork 3 to enable it to reset.

[0046] A U-shaped groove is provided on the upper part of the pull rod fork 3, and the jaw rotating mechanism is arranged in the U-shaped groove. The pull rod locking sleeve 7 is rotatably connected with the pull rod fork 3 through a pin shaft, and the pull rod locking sleeve 7 is screwed with the internal thread 14 of the pull rod locking nut 8 through an external thread. When the pull rod locking nut 8 is rotated, the pull rod locking sleeve 7 is screwed into the pull rod locking nut 8, and the pull rod 16 passes through the pull rod outer sleeve 18 and its end is inserted into the open tip 12 through the tapered center hole 34. As the pull rod locking sleeve 7 rotates until the arc groove 13 is stuck on the positioning pin 33, the pull rod locking sleeve 7 stops rotating, and the pull rod locking nut continues to be screwed. The nut 8 is screwed onto the pull rod locking sleeve 7 and the pull rod locking nut 8. At this time, due to the effect of the tapered center hole 34 of the pull rod locking nut 8, the open tip 12 clamps and fixes the pull rod 16. When the pull rod locking nut 8 is rotated in the opposite direction, the pull rod 16 will be driven to rotate together. When the arc groove 13 is rotated to the other end and is stuck on the locating pin 33, the pull rod locking nut 8 is continued to be rotated, so that the pull rod locking sleeve 7 and the pull rod locking nut 8 can be unlocked and loosened. At this time, the open tip 12 leaves the tapered center hole 34 and releases the pull rod 16, so that the pull rod 16 and the working part 30 can be replaced.

[0047] When the pull rod locking sleeve 7 and the pull rod locking nut 8 are locked, the pull rod 16, the steel wire 22 and the working part 30 are locked by the jaw rotating mechanism. When the jaw rotating mechanism is rotated, since the rotating pull head 28 and the head changing nut 25 are connected by threads, the working part 30 will also rotate with the jaw rotating mechanism, thereby realizing a rotation of the working part 30 of nearly 360° (the arc groove 13 is nearly a 360° circle).

[0048] Pulling the trigger 2 can drive the jaw rotation mechanism to shift backward, thereby pulling the pull rod 16 and the steel wire 22, and the steel wire 22 drives the pull head 27 to pull the cross-arranged working part 30 to open and close.

Claims

1. A multifunctional laparoscope working part, characterized in that: It includes a handle, a trigger, a jaw rotating mechanism, a pull rod fork, an outer cylinder, an outer cylinder rotating mechanism, a steel wire, a pull rod, a rotating pull head, a head-changing nut, an H connector, a front steering plate, a rear steering plate and a working part. The handle is provided with a mounting bracket for mounting the trigger and the outer cylinder rotating mechanism. The pull rod fork is connected to the trigger. The jaw rotating mechanism is mounted on the pull rod fork. The jaw rotating mechanism is detachably connected to one end of the pull rod. The other end of the pull rod is connected to the steel wire. The pull rod and the steel wire are connected in the outer cylinder. The outer cylinder is detachably connected to the outer cylinder rotating mechanism. The front steering plate and the rear steering plate are buckled into a circle. The column is inserted into the end of the outer cylinder, and the outer cylinder is provided with two spiral holes, which are opposite to each other and staggered up and down. The front steering plate and the rear steering plate are respectively fixed with a guide pin, and the two guide pins are respectively in the two spiral holes. With the rotation of the outer cylinder, the two guide pins move in the two spiral holes respectively and drive the front steering plate and the rear steering plate to extend and retract relatively. The head-changing nut and the H-connecting piece are hinged to each other and are respectively hinged to the front steering plate and the rear steering plate. The head-changing nut is threadedly connected to a rotating pull head, and the rotating pull head is hinged to the working part. The other end of the steel wire is connected to the rotating pull head.

2. The multifunctional laparoscope working part according to claim 1, characterized in that: The rotary slider includes a slider and a slider sleeve, one end of the slider sleeve is provided with an external thread connected to a head-changing nut, the slider sleeve is hinged with a pin hole cross-connected to the working part, the slider is inserted into the slider sleeve, a long hole is provided at the tail of the working part, one end of the slider is hinged with the long holes of the two working parts through a pin shaft, and the other end of the slider is fixedly connected to a steel wire.

3. A multifunctional laparoscope working part according to claim 1 or 2, characterized in that: The working part includes scissors, pliers, or claws.

4. The multifunctional laparoscope working part according to claim 1, characterized in that: The outer cylinder rotation mechanism includes a steering disassembly button, a steering twist and a steering sleeve. One end of the steering sleeve is fixedly connected to the outer cylinder, and the other end of the steering sleeve is provided with a flat groove. The steering disassembly button is plugged into the steering twist, and a spring is provided on the opposite side of the steering disassembly button. The steering disassembly button is provided with a steering sleeve plug-in hole. The steering sleeve plug-in hole consists of a round hole and a flat hole. The round hole matches the outer diameter of the steering sleeve, and the flat hole matches the flat groove of the steering sleeve.

5. The multifunctional laparoscope working part according to claim 1, characterized in that: One end of the trigger is hinged to the handle, and the pull rod fork is provided with two sliding guide pins which are respectively slidably plugged with the handle, and the sliding guide pins are sleeved with springs.

6. A multifunctional laparoscope working part according to claim 1 or 5, characterized in that: The jaw rotation mechanism includes a pull rod locking sleeve and a pull rod locking nut. The pull rod locking sleeve is threadedly connected to the internal thread of the pull rod locking nut through an external thread. The pull rod locking nut is provided with a conical center hole. The pull rod locking sleeve is fixed with an open pin, and the open pin is plugged into the conical center hole. The outer end surface of the pull rod locking sleeve is provided with an arc groove, and the arc groove is less than 360°. The pull rod locking sleeve is rotatably connected to the pull rod fork through a pin shaft. The pull rod fork is provided with a positioning pin, and the positioning pin is docked with the arc groove and slidably connected.

7. The multifunctional laparoscope working part according to claim 1, characterized in that: A pull rod sleeve is also provided between the pull rod and the outer cylinder. One end of the pull rod sleeve is connected to the handle, and the other end is provided with a sliding groove. The front steering piece and the rear steering piece are slidably connected to the sliding groove.

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